[colonial]

> Clean, firm, dispatchable power

Besides the examples you listed, there's also synthetic fuels. I don't know if they'll pan out, but the concept is intriguing.

Essentially, the argument goes that there's a critical solar price point at which synthesizing methane from atmospheric gas capture becomes cheaper than drilling. Said methane can be burned for power in existing plants (forming a closed cycle) or refined into heavier liquid hydrocarbons for vehicles and polymers.

The advantage here is that you don't need batteries or inverters - just dirt cheap panels - and the synthesis plants can be engineered to be productive despite only operating during the day.

I know one company is working on this with industrial scale in mind (Terraform Industries), and I believe SpaceX is also pursuing it on-site for Starship (which consumes ~1000 T of methane per launch, all of which currently has to be trucked in at great expense.)

[tedmcory77]

I wonder if this explains why Prometheus Fuels decided to do methane…

[colonial]

Probably. Methane is easier to synthesize than fuel alcohols, and has better synergy with existing infrastructure (dead simple, highly responsive gas plants don't care where their fuel comes from, after all - they'll just take the cheapest option.)